Internal-combustion engine.



F. R. PETTITT.

INTERNAL CONBUSTION'ENGINE.

APPLICATION FILED Aue.l3. 1917.

l ,27 6, 262 Patented Ag. 20, 1918 2 SHEETS-SHEET l.

am 5 'A 1 g @HQ @I 14 31a/umh@ F. R. PETTITT.

Patented Aug. 20, 1918.

2 sHEE'Ts-SHEET 2.

UNTTED STATES PATENT, orrrcu. l

FRANK R. PETTITT, oF sroK-nlm,.WASHINGTON A INTERNAL-GOMBUSTION ENGINE.

Application filed August 13, 1917. Serial o. 186,075.

To all whom t may concern:

Be it known that I, FRANK R. PETTITT, a citizen of the United States,residing at Spokane, in the county of Spokanel and State ofl/Vashington, have invented lcertain new and useful Improvements inInternal- Combustion Engines, of which the followy ing is aspecification.

The present invention relates to improvements in internal combustionengines, and is designed especially for the purpose of utilizing thevapor which is generated the crank case ofthe engine dueto thecombustion in the cylinders of the engine. Usually this vapor isexpended in radiated heat through the crank case, but by my invention Ivpropose to transfer the vapor from the crank case and introduce it intothe cylinder ofthe engine as a part of the fuel charge. The vapor,generated in the crank case is found to be impregnated with vaporizedoil, and the oil thus carried to the cylinder asa .part of the fuelcharge servesI asl a lubricant for the piston inthe The inventionconsists in certain novel combinations and arrangements of parts forfaccomplishing the above purpose, as will be hereinafter pointed outandclaimed.

In the accompanying drawings I have illustrated one complete examplev ofthe physical embodiment of my invention constructed and arrangedaccording to the best mode Ihave s o far devised for the practicalpplication of the principles of my inven- 1 tion. i

Figure 1 is a side elevation of an internal combustion engine equippedwith my invention.

Fig.-2 is a top plan view of Fig. 1.

Fig. 3-is atransverse sectlonal view of the engine. Y A Fig. 4 is anenlarged'detail view of the breather pipe lof the engine.

Fig'. 5 is a side view of breather or oil lubricating inlet for engine.

Fig. 6 is atop plan View of the cap.

Fi 7 is a view of a joint in the pipe leading romthe breather, showingin dotted lines a valve for turning the vapor toward either the manifoldof the engine or the carbureter. v

Fig. 8 is an enlarged view of a perforated plate inserted in the top ofthe crank case.,

the cap for the the Fig. 9 is a Sectional View of this pian-0f .l In thepreferred embodiment of my inventln as shown in thefdrawings,-I haveillustrated an lnternal combustion engine of usualV type in which thecrank case is indif cated by the numeral 1, the clutch case is indlcated.by the numeral 2, and thei'usual manifold 3 and well-known type 0farbureter 4.

In Fig. 1' I have shown a pipe 5 connected to the c rank case andopen1ng therein at 6, and this v pipe passes upwardly over theSpecification of Letters Patent. l PatentediAug. 20, 19.18. I

engine and is connected to the carbureter i at 7. This pipe `5 isdesigned 'to transfer the vapor generated in the crank case, from thecrank case to the carburetor, and as this vapor is .highly chargedwithoil in suspension, it will readily be seen that the oil in the vaporwill be carriedinto the cylinder fand may there be utilized to lubricatethe iston; The vapor is introducedwith the uel charge in the top of thecylinder, and

thecrank case, I employ a perforated plate' 8 in the top plate 9 of theclutch case, which communicates with the crank case. The

-in this manner the cylinder is lubricated plate 8 has perforations 10through which Y the air may be filtered to the clutch case and passedfrom thence into the crank case,

and thepassage of air is automatically controlled by a disk or valve11,whch is regulated by a spring or resilient arm 12 =at tached to theplate.v The valve is closed under ynormal conditions, but when the vaporiscarried away from lthe crank case, atmospheric pressure opens thevalve against the spring lever, and permits entrance of air into thecrank case.

If desired, a second pipe, as 13, may be i.

utilized, and in Figs. 1 and 2 it will be seen that thls pipe isattached to the breather pipeJ 14.-, which is the lubricating oil inletfor the engine, andthe pipe13 extends from the breather toward the rearof the engine, where it has a joint 15 provided with a valve 16, whichis controlled by a lever arm 17, and this valve is designed to pass thevapor to the/carburetor 4,.by means of the pipe 18, or to the manifold 3through the pipe 19. The breather is equipped with a threaded cap 20,and the cap has a perfo` rated top 21 which is regulated by a damper, orperforated disk 22 in manner similar to a stove damper. The introductionof air through the cap is controlled by this damper, and the air throughthe perforated cap may be cut 0H when it is desired to direct the vaporinto the engine. not being used', the cap may be removed entirely,

From the above description it will be evident that lf have provided asystem of piping for use in connection with an internall combustionengine by mean@ of which the purposes above set forth are accomplished.

When the vapor is What lf claim is: l In an internal combustion engine,the combination With a portion of the crank case 4having an opening, acarbureter, and the\ v resilient arm controlling theI valve whereby acirclation of vapor is automatically maintained as described.

ln testimony whereof lf afx my signature.

FRANK R. PETTITT.

